BONE DENSITY MEASURING DEVICE

摘要

[PROBLEMS] To provide a small and inexpensive noninvasive bone density measuring device. [MEANS FOR SOLVING PROBLEMS] The measuring section of a bone density measuring device comprises a near infrared light emitting section (120) arranged in a holding body (110), and a light receiving section (130) for receiving light through a bone of measurement object. An arm is inserted, for example, into the holding body (110) and light absorption (absorbance) by the arm bone is measured thus measuring bone density. The light emitting section (120) and the light receiving section (130) are connected with a control section (140). The control section (140) controls emission from the light emitting section (120), receives a measurement from the light receiving section (130) and displays it as bone density. In order to remove the influence by light from the background or the difference in thickness of bone, ratio of absorbance between two wavelengths is preferably employed. Even when two light emitting elements (LEDs) are employed in order to obtain light having two wavelengths, two light emitting elements are allowed to emit light alternately and thereby only one light receiving element is required.